{"title":"A monotonic and low-power digitally controlled oscillator using standard cells for SoC applications","authors":"D. Sheng, Ching-Che Chung, Jhih-Ci Lan","doi":"10.1109/ACQED.2012.6320487","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320487","url":null,"abstract":"In this paper, a monotonic and low-power digitally controlled oscillator (DCO) with cell-based design for System-On-Chip (SoC) applications is presented. The proposed DCO employs a cascade-stage structure to achieve high resolution and wide range at the same time. Besides, based on the proposed two-level controlled interpolation structure, the proposed DCO can provide monotonic delay with low power consumption and low circuit complexity as compared with conventional approaches. Simulation results show that power consumption of the proposed DCO can be improved to 0.337mW (@1118MHz) with 0.82ps resolution. In addition, the proposed DCO can be implemented with standard cells, making it easily portable to different processes and very suitable for SoC applications.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126550195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Unified model for analyzing timing delay and crosstalk effects in Carbon Nanotube interconnects","authors":"Debaprasad Das, H. Rahaman","doi":"10.1109/ACQED.2012.6320484","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320484","url":null,"abstract":"Carbon Nanotube (CNT) has become the promising candidate for replacing the traditional Copper (Cu) based interconnect systems in future technology nodes. This paper presents an analytical model for timing and crosstalk in the CNT based nano-interconnect systems. The proposed model is compared with SPICE and it is found that the proposed model is 100% accurate with respect to SPICE and in an average ~250 times faster than SPICE. Using the proposed analytical model the crosstalk noise, delay, overshoot/undershoot are estimated in CNT based nano-interconnects for three different CNT parameters; CNT diameter, length, and metallic fraction.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127860603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enhanced tracing and visibility in logic emulation environment by optimized design slicing","authors":"S. Banerjee, T. Gupta","doi":"10.1109/ACQED.2012.6320500","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320500","url":null,"abstract":"Field Programmable Gate Array (FPGA) based logic emulators, used for functional verification of large and complex System-on-chip (SoC) designs are characterized by two conflicting requirements - execution speed and signal visibility. Achieving 100% signal visibility in post-processing debug for long emulation runs impacts execution speed and requires large amount of disk space. Techniques like combinational reconstruction, periodic snapshot based tracing, state restoration etc. have reduced the amount of trace data and hence the impact on execution speed to some extent, but fail to provide a scalable solution for growing design sizes. Selective tracing based on signal list specification does not guarantee tracing all relevant signals needed to be investigated to debug a functional mismatch, often requiring re-runs to generate relevant data. This paper presents a novel tracing and visibility system based on the concept of optimized design slicing (ODS), which minimizes trace data while providing sufficient debug visibility by tracing only a set of design portions or “slices” that are likely to affect values of a set of “observed variables”, or in other words influence a set of properties under verification. These slices are extracted automatically from the design logic and capture all the signals likely to impact the observed variables, ensuring sufficient debug visibility. The slices are “optimized” by techniques like software memory replay and blackbox elimination. The proposed system achieves effective reduction in trace data, higher execution speed and provides necessary debug visibility for post-processing debug.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121093645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of a wave-pipelined serializer-deserializer with an asynchronous protocol for high speed interfaces","authors":"Bui Chinh Hien, Seok-Man Kim, Kyoungrok Cho","doi":"10.1109/ACQED.2012.6320513","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320513","url":null,"abstract":"In this paper, we proposed an asynchronous wave-pipelined Serializer and Deserializer, or WP-SERDES in brief, that is totally clock-free. In contrast to conventional SERDES that employ power hungry phase-locked loops (PLLs) for synchronization in serializers and clock-data recovery (CDR) circuits in deserializers, the proposed WP-SERDES employs delay elements (DEs) consisting of inverter chains for timing reference. Besides, throughput of the proposed WP-SERDES is adjustable thanks to the voltage-controlled inverters used in the DEs. The proposed WP-SERDES which was simulated using 180nm CMOS process shows a 3.9 Gb/s throughput and 2.44 mW power consumption.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"520 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116209927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Load model technique for mesh-structured power distribution network","authors":"Hyoeon Yang, T. Bae, Jinwook Kim, Young Hwan Kim","doi":"10.1109/ACQED.2012.6320504","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320504","url":null,"abstract":"This paper proposes an efficient load model for power network noise analysis. The proposed method approximates an uninteresting part of a large mesh-structured circuit to a simple load model which consists of a couple of RLC elements. In the experimental results, the proposed method reduced a CPU time of SPICE simulation by up to 95% while suppressing the maximum and average voltage errors less than 0.0207 V (1.4%) and 0.0048 V (0.325%) respectively.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115938802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Monte Carlo simulation in VDDmin modeling across Fab process","authors":"Huiping Guo, Yang Yang, Jiang Bowen","doi":"10.1109/ACQED.2012.6320499","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320499","url":null,"abstract":"VDDmin is defined as the lowest supply voltage at which a device can produce correct logic states. It is typically obtained by performing a binary or linear supply voltage search. VDDmin or very-low voltage (VLV) testing is a non-IDDQ defect based test method that has been shown to be an effective method to screen manufacturing defects [1, 2, 3, 4]. It is taken as an indicator of device performance and reliability. Monte Carlo simulation is a random sampling based computational methodology, used extensively for engineering analysis [5, 6, 7]. This paper discuss a VDDmin determination methodology base on-Monte Carlo simulation, case study is presented to illustrate that this approach can precisely predict yield impact due to process shift.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116474546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A methodology for LBIST logic diagnosis in high volume manufacturing","authors":"A. Jayalakshmi, Tan Ewe Cheong","doi":"10.1109/ACQED.2012.6320510","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320510","url":null,"abstract":"LBIST (Logic Built-In Self Test) is a structural test method that tests a circuit by running test patterns generated on the die as opposed to ATPG (Automatic Test Pattern Generation) method in which the test patterns are pre-generated to test specific fault types. LBIST has emerged as an alternative scan based test methodology due to its attractive benefits such as reduced pattern size and field testability. LBIST uses pseudo random patterns enabling it to generate patterns on the die saving tester memory to a large extent. At the same time it poses challenges to enable fail data collection for later debug as the LBIST test iterations are usually large (typically 100000). Tester time is not a big concern for a LBIST based method if the objective is to know if the unit passed or failed, but memory usage is a concern due to the need to compare intermediate scan responses to determine and collect failing responses for diagnosis and debug purposes. This motivated us to come up with a methodology for fail data collection that optimizes tester time and memory and collects enough fail data to provide acceptable diagnosis quality. In this paper we have presented a methodology for fail data collection and discussed the tester overheads for LBIST logic diagnosis.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122650797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A GA-based optimization for Fourth-order Sallen-Key low-pass filter","authors":"Teoh Yeong Yeap, N. Chin","doi":"10.1109/ACQED.2012.6320494","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320494","url":null,"abstract":"In order to optimize and simulate the design variables for a Fourth-order Sallen-Key low-pass filter, a genetic algorithm (GA) based optimization approach is proposed in this paper. The Fourth-order Sallen-Key low-pass filter design is synthesized using LTSpice whereas the GA model is developed by Matlab. The aims of the design include gain maximization, pass-band ripple minimization, and cut-off satisfaction. From the results obtained, the desired filter design that satisfies the specification constraints and required goals is produced.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121831356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Maximization of SRAM energy efficiency utilizing MTCMOS technology","authors":"Bo Wang, Jun Zhou, T. T. Kim","doi":"10.1109/ACQED.2012.6320472","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320472","url":null,"abstract":"Higher-Vth devices in the cross-coupled latches and the write access transistors, and lower-Vth devices in the read ports are preferred for reducing leakage current without sacrificing performance. However, at ultra-low supply voltage levels, higher-Vth devices can retard or nullify energy efficiency due to substantially slower write speed than read. This paper presents energy efficiency maximization techniques for 8T SRAMs utilizing multi-threshold CMOS (MTCMOS) technology and various design techniques. Simulation results using a commercial 65 nm technology show that the SRAM energy efficiency can improved up to 33× through MTCMOS and prior power reduction and performance boosting techniques.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134104770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Khosropour, S. Kashani-Gharavi, R. Asadpour, A. Afzali-Kusha
{"title":"Process variation tolerant SRAM cell design using additive model considering NBTI effect","authors":"A. Khosropour, S. Kashani-Gharavi, R. Asadpour, A. Afzali-Kusha","doi":"10.1109/ACQED.2012.6320474","DOIUrl":"https://doi.org/10.1109/ACQED.2012.6320474","url":null,"abstract":"In this paper, we propose a statistical methodology for the design of process variation tolerant yet low-power 6T SRAM cells. In addition to process variations, Negative Bias Temperature Instability (NBTI) has been included in the design methodology such that the time dependence of the failure probability is taken into account. To increase the modeling accuracy of the statistical distributions of different SRAM reliability metrics such as static noise margin (SNM) and Read Current, a modeling scheme based on nonlinear regression is suggested. The design technique, which minimizes the failure probabilities due to the process variations, considers the widths and lengths of the six transistors of the cell as design parameters. The sizes of the transistors are selected such that the area constraint is not violated. Also, to include the static power consumption of the SRAM block in the design methodology, we introduce a method for estimating the SRAM block leakage distribution. To show the efficacy of the technique, the results of applying this methodology for a 45 nm CMOS technology are presented.","PeriodicalId":161858,"journal":{"name":"2012 4th Asia Symposium on Quality Electronic Design (ASQED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130183677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}